added adwaita fonts

modules/common/fonts.nix

@@ -12,4 +12,8 @@
       monaspace
     ]
     ++ builtins.filter lib.attrsets.isDerivation (builtins.attrValues pkgs.nerd-fonts);
+
+  environment.systemPackages = with pkgs; [
+    adwaita-icon-theme
+  ];
 }